Question

我正在研究MVC 4应用程序，并希望通过消息重定向到调用操作视图：

调用的行动：上传
当前视图：索引

public class HospitalController: Controller {
        public ActionResult Index()
        {
            return View(Model);
        }
        
        [HttpPost]
        public ActionResult Index(Model model)
        {
            return View(ohosDetailFinal);
        }
        
        [HttpPost]
        [ValidateAntiForgeryToken]
        public ActionResult Upload(HttpPostedFileBase upload,FormCollection form)
        {
            //Here i want to pass messge after file upload and redirect to index view with message
            // return View(); not working
        }
}

@using (Html.BeginForm("Upload", "Hospital", null, FormMethod.Post, new { enctype = "multipart/form-data", @class = "" }))
{
    @Html.AntiForgeryToken()
    @Html.ValidationSummary()
    <input type="file" id="dataFile" name="upload" class="hidden" />
}

谢谢！

Answer 1

按照 PRG 模式进行操作。成功处理后，将用户重定向到另一个GET操作。

您可以使用RedirectToAction方法返回RedirectResult。这将在浏览器中返回304响应，并在位置标题中显示新的URL，浏览器将向该URL发出新的GET请求。

[HttpPost]
public ActionResult Upload(HttpPostedFileBase upload,FormCollection form)
{
   //to do : Upload
   return RedirectToAction("Index","Hospital",new { msg="success"});
}

现在，在“索引”操作中，您可以添加此新参数msg并检查其值并显示相应的消息。重定向请求将具有带密钥消息的查询字符串（例如：/Hospital/Index?msg=success）

public ActionResult Index(string msg="")
{
   //to do : check value of msg and show message to user
   ViewBag.Msg = msg=="success"?"Uploaded successfully":"";
   return View();
}

并在视图中

<p>@ViewBag.Msg</p>

如果您不喜欢网址中的查询字符串，则可以consider using TempData。但tempdata仅适用于下一个请求。

Answer 2

DateTimeTypeConverter

Answer 3

尝试以下代码，希望它有所帮助。！

查看

    @using (Html.BeginForm("Upload", "Hospital", null, FormMethod.Post, new { enctype = "multipart/form-data", @class = "" }))
      {

       if (TempData["Info"] != null)
        {
       @Html.Raw(TempData["Info"])
        }


      @Html.AntiForgeryToken()
      @Html.ValidationSummary()
      <input type="file" id="dataFile" name="upload" class="hidden" />
      }

控制器

     [HttpPost]
     [ValidateAntiForgeryToken]
     public ActionResult Upload(HttpPostedFileBase upload,FormCollection form)
      {
        //Here i want to pass messge after file upload and redirect to index view with message
        TempData["Info"]="File Uploaded Successfully!";
        return RedirectToAction("Index");
      }

文件上传后重定向回传MVC 4 c＃

3 个答案: